CLASSIFIED CATALOG OF ILLINOIS ALGAE 99 



Family: CHARACIACEAE 

 CHARACIUM A. Braun, 1849 



C. AMBIGUUM Herm. Tiffany, Contrib. Franz T. Stone Lab. 6: 48. pi. 



7. f. 116 (1934). 



Johnson & Atwell 1890, p. 19: Cook, Evanston— in "Big Ditch" 

 (Nov.). 



C. NAEGELii A. Br. Tiffany, loc. ciL, L 121 (1934). > 



Johnson & Atwell 1890, p. 19: Cook— "Big Woods" (Apr.). 



C. PRiNGSHEiMii A. Br. Collins, Tufts Coll. Stud. 2(3): 151 (1909). 

 Transeau: Coles, Charleston — pond and small stream (Dec- 

 Mar.). 



Family: HYDRODICTYACEAE 



HYDRODICTYON Roth, 1800 



H. RETicuLATUM (L.) Lag. Tiffany, Contrib. Franz T. Stone Lab. 6: 

 52. pi. 8. f. 130 (1934); DeToni, Sylloge Algarum 1(2): 562 (1889). 

 Hydrodictyon utriculatum Roth 



Johnson & Atwell 1890, p. 19, as H. utriculatum; Britton: Cook, 

 Argonne Forest Preserve — Tuma Lake, July 14, 1939, #553, 554; 

 Palos Park— small shallow pond, July 13, 1939, #535; Rose Hill 

 (May). Edgar, Paris — reservoir (July). Jasper, Newton — small 

 stream and pond (May, Aug., Sept.). Lawrence, Pinkstaff- — Bee 

 Branch Creek and other small streams and ponds (June-Nov.). 

 McHenry, McHenry— swamp at N.E. side of McCulIon Lake, 

 July 6, 1939, #387. 



PEDIASTRUM Meyen, 1829 



P. ANGULOSUM (Ehr.) Menegh. Brunnthaler in Pascher, Suesswass.-fl. 



Deutsch. 5(2): 99 (1915). 



Transeau 1913B, p. 81: Coles, Charleston — pond (July). 



P. BORYANUM (Turp.) Menegh. Tiffany, Contrib. Franz T. Stone Lab. 



6: 49. pi. 8. f. 146, 147 (1934); DeToni, Sylloge Algarum 1(2): 576 



(1889). 



Micrasterias boryana Ehr. ; M. elliptica Ehr. ; M. tricyclia Ehr. 

 Bailey 1845, p. 34, as M. boryana, M. elliptica and M. tricyclia 

 (St. Clair). Johnson & Atwell 1890, p. 19; JelHffe 1893, p. 311 

 (Cook). Kofoid 1908, pp. 26, 292, 315 (Mason). Collins 1909, p. 

 177; Transeau 1913B, p. 81 ; 1916, p. 125 (Clark, Coles, Douglas). 

 Eddy 1927B, pp. 208, 223 (Cook). Purdy 1930, pp. 63, 68, 72 

 (Will). Britton 1940, p. 71 (Cook). Britton (Lake, McHenry). 



Clark, Casey — pond (May). Coles, Charleston, Dorans — 

 ponds and pools (Jan.-July, Oct., Dec), laboratory aquaria 

 (Mar., Dec). Cook, Argonne Forest Preserve — Maple Lake, 

 Sept. 8, 1939, #986; Chicago— Lake Michigan (July, Aug., Nov.); 



